Dielectric Properties of Relaxor Ceramics BBN
| Autor: | J. Prapuolenis, Andrei L. Kholkin, J. Banys, A. Brilingas, Povilas Keburis, Maria Elisabete Costa |
|---|---|
| Rok vydání: | 2007 |
| Předmět: |
Permittivity
Phase transition Materials science Condensed matter physics Relaxation (NMR) Physics::Optics Relative permittivity Dielectric Atmospheric temperature range Condensed Matter Physics Electronic Optical and Magnetic Materials Dielectric spectroscopy Condensed Matter::Materials Science Nuclear magnetic resonance Dispersion (optics) |
| Zdroj: | Ferroelectrics. 353:149-153 |
| ISSN: | 1563-5112 0015-0193 |
| DOI: | 10.1080/00150190701368109 |
| Popis: | The dielectric investigation of BaBi 2 Nb 2 O 9 (BBN) ceramics was performed in a broad frequency and temperature range. It was observed, that this ceramics possesses not typical ferroelectric relaxor behaviour, which is close to dipolar glass. A very diffuse phase transition is observed in the whole measured temperature range and the dielectric permittivity exhibits a strong dispersion in the frequency range from Hz to microwaves where the maximum of permittivity, T max , shifts to higher temperature as the frequency increases. From the frequency dependences of the real and imaginary parts of dielectric permittivity the parameters of dielectric dispersion and the real distribution function of the relaxation times f(τ) have been calculated. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|